تفسير : (ah, what will convey unto thee) o muhammad (what the reality is!) it is called the reality because of the reality of things which will entitle the believer to enter the garden due to his faith and the disbeliever to enter the fire because of his disbelief.
Jalāl al-Dīn al-Maḥallī
تفسير : and how would you know what the reality is? ([repeated as] an extra emphasis of its enormity; the first mā [of the previous verse] is the subject, the second one, its predicate; the second mā and its predicate also function as the second direct object of [the verb] ‘knowing’).